January weather forecast
Falls Church, VA

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Weather in January

Weatherwise, January starts the year off on a chilly note in Falls Church, Virginia, with it being the coldest month of the year. With an average high temperature of 40.1°F (4.5°C), warming layers will certainly be in order. The cold is accompanied by occasional precipitation, with rainfall averaging 0.51" (13mm) on six days of the month. In terms of daylight, the month features shorter days, averaging about 9.8 hours. Steamy cups of coffee and comforting blankets will be a common necessity during this month in Falls Church.

Temperature

The coldest month is January, with an average high-temperature of 40.1°F (4.5°C) and an average low-temperature of 26.8°F (-2.9°C).

Humidity

In Falls Church, Virginia, the average relative humidity in January is 72%.

Rainfall

The months with the least rainfall are January and September Rain falls for 6 days and accumulates 0.51" (13mm) of rain.

Snowfall

January through April, November and December are months with snowfall in Falls Church, Virginia. January is the month with the most snowfall. Snow falls for 2.7 days and accumulates 0.98" (25mm) of snow.

Daylight

In Falls Church, the average length of the day in January is 9h and 49min.
On the first day of the month, sunrise is at 7:27 am and sunset at 4:57 pm. On the last day of January, in Falls Church, Virginia, sunrise is at 7:15 am and sunset at 5:28 pm EST.

Sunshine

In Falls Church, the average sunshine in January is 5.2h.

UV index

The months with the lowest UV index in Falls Church are January, November and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a low threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: A daily high UV index of 2 in January leads to these guidelines:
Children, infants, and individuals with sensitive skin should be constantly protected from extended sun exposure. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Be watchful! The reflection of snow can enhance the intensity of the Sun's UV radiation nearly double.
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Frequently asked questions

What time of the year is the coldest in Falls Church?

January, known for its average high temperature of 40.1°F (4.5°C) and an average low temperature of 26.8°F (-2.9°C), is the coldest month in Falls Church.

Is January cold in Falls Church?

During January, Falls Church experiences an average high-temperature of 40.1°F (4.5°C) and a low-temperature of 26.8°F (-2.9°C).

What is the average humidity in January in Falls Church?

In Falls Church, Virginia, the average relative humidity in January is 72%.

What is the driest month in Falls Church?

The months with the least rainfall in Falls Church, Virginia, are January and September Rain falls for 6 days and accumulates 0.51" (13mm) of rain.

How much does it rain in Falls Church in January?

In Falls Church, in January, during 6 rainfall days, 0.51" (13mm) of precipitation is typically accumulated.

What is the snowiest month in Falls Church?

January is the month with the most snowfall in Falls Church. Snow falls for 2.7 days and accumulates 0.98" (25mm) of snow.

How much does it snow in Falls Church in January?

In January, in Falls Church, it is snowing for 2.7 days. Throughout January, 0.98" (25mm) of snow is accumulated.

What is the average length of the day in January in Falls Church?

In January, the average day length is 9h and 49min.

What time are sunrise and sunset in January in Falls Church?

In January, on the first day of the month, sunrise is at 7:27 am and sunset at 4:57 pm. On the last day of the month, sunrise is at 7:15 am and sunset at 5:28 pm EST.

How many hours of sunshine does Falls Church have in January?

In January, the average sunshine duration in Falls Church, Virginia, is 5.2h.

What is the month with the lowest UV index in Falls Church?

The months with the lowest UV index in Falls Church, Virginia, are January, November and December, with an average maximum UV index of 2.

How high is the UV index in January in Falls Church?

In Falls Church, the average daily maximum UV index in January is 2. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unsafe exposure to Sun's UV rays.
Today
Tomorrow
Long-term
YearJanuaryFMAMJJASOND
Dec
January
Feb
Average high temperature
45.5°F 7.5°C
40.1°F 4.5°C
44.6°F 7°C
Average low temperature
33.1°F 0.6°C
26.8°F -2.9°C
29.5°F -1.4°C
Average pressure
30.11" 765mmHg
30.11" 765mmHg
30.07" 764mmHg
Average wind speed
6.8mph 10.9km/h
7.4mph 11.9km/h
7.5mph 12.1km/h
Average max. wind speed
7.4mph 11.9km/h
8.1mph 13km/h
8.1mph 13km/h
Average wind speed gusts
10.6mph 17.1km/h
11.4mph 18.3km/h
11.7mph 18.8km/h
Average humidity
76%
72%
74%
Average rainfall
0.67" 17mm
0.51" 13mm
0.55" 14mm
Average rainfall days
6.9
6
6.3
Average snowfall
0.28" 7mm
0.98" 25mm
0.35" 9mm
Average snowfall days
1.2
2.7
3.6
Average daylight
9h 3min
9h 5min
10h 5min
Average sunshine
5h 1min
5h 1min
5h 1min
Average sunshine days
22
22.1
18.3
Average UV index
2
2
3
Average cloud cover
45%
44%
44%
Average visibility
6mi 9.7km
6mi 9.7km
6mi 9.7km

Average temperature in January
Falls Church, VA

Average temperature in January - Falls Church, VA
  • Average high temperature in January: 40.1°F

The warmest month (with the highest average high temperature) is July (87.4°F).
The month with the lowest average high temperature is January (40.1°F).

  • Average low temperature in January: 26.8°F

The month with the highest average low temperature is July (69.1°F).
The coldest month (with the lowest average low temperature) is January (26.8°F).

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Average pressure in January
Falls Church, VA

Average pressure in January - Falls Church, VA
  • Average pressure in January: 30.11"Hg

The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).

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Average wind speed in January
Falls Church, VA

Average wind speed in January - Falls Church, VA
  • Average wind speed in January: 7.4mph

The windiest month (with the highest average wind speed) is March (7.7mph).
The calmest month (with the lowest average wind speed) is August (4.9mph).

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Average humidity in January
Falls Church, VA

Average humidity in January - Falls Church, VA
  • Average humidity in January: 72%

The months with the highest relative humidity are October and December (76%).
The month with the lowest relative humidity is July (70%).

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Average rainfall in January
Falls Church, VA

Average rainfall in January - Falls Church, VA
  • Average rainfall in January: 0.51"

The wettest month (with the highest rainfall) is August (1.5").
The driest months (with the least rainfall) are January and September (0.51").

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Average rainfall days in January
Falls Church, VA

Average rainfall days in January - Falls Church, VA
  • Average rainfall days in January: 6 days

The month with the highest number of rainy days is July (13.5 days).
The month with the least rainy days is November (5.6 days).

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Average snowfall in January
Falls Church, VA

Average snowfall in January - Falls Church, VA
  • Average snowfall in January: 0.98"

The month with the highest snowfall is January (0.98").
The months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in January
Falls Church, VA

Average snowfall days in January - Falls Church, VA
  • Average snowfall days in January: 2.7 days

The month with the highest number of snowfall days is February (3.6 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

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Average daylight in January /
Average sunshine in January
Falls Church, VA

Average daylight in January / Average sunshine in January - Falls Church, VA
  • Average daylight in January: 9h and 5min

The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).

  • Average sunshine in January: 5h and 1min

The month with the most sunshine is July (Average sunshine: 10h and 54min).
The months with the least sunshine are February and December (Average sunshine: 5h and 6min).

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Average sunshine days in January
Falls Church, VA

Average sunshine days in January - Falls Church, VA
  • Average sunshine days in January: 22.1 days

The month with the most sunshine days is November (23 days).
The month with the least sunshine days is July (14.3 days).

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Average UV index in January
Falls Church, VA

Average UV index in January - Falls Church, VA
  • Average UV index in January: 2

The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, November and December (UV index 2).

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Average cloud cover in January
Falls Church, VA

Average cloud cover in January - Falls Church, VA
  • Average cloud cover in January: 44

The month with the most cloud cover is March (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 30).

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Average visibility in January
Falls Church, VA

Average visibility in January - Falls Church, VA
  • Average visibility in January: 6mi

The months with the highest visibility are January, February, March, April, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is May (5mi).

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Falls Church, Virginia, USA

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